Chapter 6 Differential and Multistage Amplifiers2

Chapter 6 Differential and Multistage Amplifiers2 -...

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Chapter 6 Differential and Multistage Amplifiers Introduction 6.1 The BJT differntial pair 6.2 Small-signal operation of the BJT differential amplifier 6.3 Other nonideal characteristics of the differential amplifier 6.4 MOS diffenrential amplifiers 6.5 Biasing in intergrated circuits 6.6 The BJT differential amplifier with active load 6.9 Multistage amplifiers
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Operation with a Differential Input Volt age Ø The MOS differential pair with a differential input signal vid applied. Ø With vid positive: vGS 1 vGS 2, iD 1 iD 2, and vD 1 < vD 2; thus ( vD 2 - vD 1) will be positive. Ø With vid negative: vGS 1 < vGS 2, iD 1 < iD 2, and vD 1 vD 2; thus ( vD 2 - vD 1) will be negative.
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Operation with a Differential Input Volt age Differential input voltage. Response to the differential input signal. The current I can be steered from one MOS to th e other by varying the differential input voltage in the range: When differential input voltage is very small, the differential output voltage is proportional to it, and the gain is high. OV id OV V v V 2 2 -
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Large-Signal Operation Ø Transfer characteristic curves Ø Normalized plots of the currents in a MOSFET differential pair. Ø Note that VOV is the overdrive voltage at which Q 1 and Q 2 operate when conducting drain currents equal to I /2.
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Large-Signal Operation Nonlinear curves. Maximum value of input differential voltage. When
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This note was uploaded on 03/02/2012 for the course EI 207 taught by Professor Chengjianping during the Fall '10 term at Shanghai Jiao Tong University.

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Chapter 6 Differential and Multistage Amplifiers2 -...

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